Every tool you need.
One tab, no fuss.
Free utilities for developers and curious humans - formatters, generators, encoders, security helpers. Most run in your browser; the few that need a server (DNS, WHOIS, OCR, conversions) process data in memory and discard it. No accounts, no signup, no nonsense.
Featured tools
316 tools from our most-used - pick one and go.
Price Tag Generator
Bulk price tags with barcodes. A4-ready PDF, print and cut, no signup needed.
Image Color Picker
Pull the exact color from any photo. HEX, RGB, OKLCH plus a saved palette.
Barcode Generator
Create EAN-13, UPC, Code 128, ITF and more. No signup, print-ready output.
BMI Calculator
Check your BMI against the WHO healthy weight range in seconds.
Full name
Generate an OpenPGP keypair (Ed25519 or RSA) right in your browser. Armored ASCII format, ready to import.
Savings calculator
See how compound interest grows your money over time. Doubles as an FD and EPF calculator.
EAN, UPC, GTIN Validator
Verify the check digit of a barcode or compute it if the last digit is missing.
2FA Backup Codes Generator
One-time recovery codes to sign in when you lose your 2FA phone.
Loan calculator
Get your monthly payment (EMI), total interest, and full amortization schedule in seconds.
Running Pace Calculator
Running pace, time or distance, with per-kilometer splits and race predictions.
Age Calculator
Find your exact age down to the day, plus total days, hours and minutes alive.
Unit converter
Convert length, weight, temperature, volume, speed, pressure, energy and power between metric and imperial. Exact formulas, works offline.
systemd Unit Builder
Assemble .service and .timer unit files from sensible presets (Node web app, Python worker, oneshot backup, database, docker compose). Every systemd directive explained in plain English.
PNG to ICNS converter (macOS)
Upload a PNG, get an .icns file for macOS apps with every size: 16, 32, 64, 128, 256, 512, 1024 px (including Retina @2x variants).
Macros Calculator
Split your daily calories into protein, fat and carbs, in grams that make sense.
Tip calculator
Calculate the tip and split the bill between people in a restaurant or bar in a second.
Browse by category
Pick a topic and see every tool in one place.
Encrypted notes
Send a secret message that self-destructs after one read. The encryption key never leaves your browser.
QR codes
QR code generators: link, Wi-Fi, vCard, email, SMS, text.
Passwords and auth
Password generator, breach check, hash, bcrypt, PIN, TOTP, JWT decoder.
Colors
HEX/RGB/HSL/OKLCH converter, mixers, palettes, contrast, color-blindness, gradients.
Loans & credit
Loan, refinance, mortgage, debt payoff and credit card payoff calculators.
JSON & schemas
JSON formatter, JSON↔YAML↔TOML, JSONPath, JSON Schema, JSON→TypeScript, XLSX→JSON.
Save the bookmark.
Free, no signup required.